| //===- IRObjectFile.cpp - IR object file implementation ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the IRObjectFile class implementation. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Object/IRObjectFile.h" |
| #include "RecordStreamer.h" |
| #include "llvm/Bitcode/ReaderWriter.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/GVMaterializer.h" |
| #include "llvm/IR/Mangler.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCAsmInfo.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCObjectFileInfo.h" |
| #include "llvm/MC/MCTargetAsmParser.h" |
| #include "llvm/MC/MCParser/MCAsmParser.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "llvm/Support/TargetRegistry.h" |
| #include "llvm/Support/raw_ostream.h" |
| using namespace llvm; |
| using namespace object; |
| |
| IRObjectFile::IRObjectFile(std::unique_ptr<MemoryBuffer> Object, |
| std::unique_ptr<Module> Mod) |
| : SymbolicFile(Binary::ID_IR, std::move(Object)), M(std::move(Mod)) { |
| // If we have a DataLayout, setup a mangler. |
| const DataLayout *DL = M->getDataLayout(); |
| if (!DL) |
| return; |
| |
| Mang.reset(new Mangler(DL)); |
| |
| const std::string &InlineAsm = M->getModuleInlineAsm(); |
| if (InlineAsm.empty()) |
| return; |
| |
| StringRef Triple = M->getTargetTriple(); |
| std::string Err; |
| const Target *T = TargetRegistry::lookupTarget(Triple, Err); |
| if (!T) |
| return; |
| |
| std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(Triple)); |
| if (!MRI) |
| return; |
| |
| std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, Triple)); |
| if (!MAI) |
| return; |
| |
| std::unique_ptr<MCSubtargetInfo> STI( |
| T->createMCSubtargetInfo(Triple, "", "")); |
| if (!STI) |
| return; |
| |
| std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo()); |
| if (!MCII) |
| return; |
| |
| MCObjectFileInfo MOFI; |
| MCContext MCCtx(MAI.get(), MRI.get(), &MOFI); |
| MOFI.InitMCObjectFileInfo(Triple, Reloc::Default, CodeModel::Default, MCCtx); |
| std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx)); |
| |
| std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm)); |
| SourceMgr SrcMgr; |
| SrcMgr.AddNewSourceBuffer(Buffer.release(), SMLoc()); |
| std::unique_ptr<MCAsmParser> Parser( |
| createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI)); |
| |
| MCTargetOptions MCOptions; |
| std::unique_ptr<MCTargetAsmParser> TAP( |
| T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions)); |
| if (!TAP) |
| return; |
| |
| Parser->setTargetParser(*TAP); |
| if (Parser->Run(false)) |
| return; |
| |
| for (auto &KV : *Streamer) { |
| StringRef Key = KV.first(); |
| RecordStreamer::State Value = KV.second; |
| uint32_t Res = BasicSymbolRef::SF_None; |
| switch (Value) { |
| case RecordStreamer::NeverSeen: |
| llvm_unreachable("foo"); |
| case RecordStreamer::DefinedGlobal: |
| Res |= BasicSymbolRef::SF_Global; |
| break; |
| case RecordStreamer::Defined: |
| break; |
| case RecordStreamer::Global: |
| case RecordStreamer::Used: |
| Res |= BasicSymbolRef::SF_Undefined; |
| Res |= BasicSymbolRef::SF_Global; |
| break; |
| } |
| AsmSymbols.push_back( |
| std::make_pair<std::string, uint32_t>(Key, std::move(Res))); |
| } |
| } |
| |
| IRObjectFile::~IRObjectFile() { |
| GVMaterializer *GVM = M->getMaterializer(); |
| if (GVM) |
| GVM->releaseBuffer(); |
| } |
| |
| static const GlobalValue *getGV(DataRefImpl &Symb) { |
| if ((Symb.p & 3) == 3) |
| return nullptr; |
| |
| return reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3)); |
| } |
| |
| static uintptr_t skipEmpty(Module::const_alias_iterator I, const Module &M) { |
| if (I == M.alias_end()) |
| return 3; |
| const GlobalValue *GV = &*I; |
| return reinterpret_cast<uintptr_t>(GV) | 2; |
| } |
| |
| static uintptr_t skipEmpty(Module::const_global_iterator I, const Module &M) { |
| if (I == M.global_end()) |
| return skipEmpty(M.alias_begin(), M); |
| const GlobalValue *GV = &*I; |
| return reinterpret_cast<uintptr_t>(GV) | 1; |
| } |
| |
| static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) { |
| if (I == M.end()) |
| return skipEmpty(M.global_begin(), M); |
| const GlobalValue *GV = &*I; |
| return reinterpret_cast<uintptr_t>(GV) | 0; |
| } |
| |
| static unsigned getAsmSymIndex(DataRefImpl Symb) { |
| assert((Symb.p & uintptr_t(3)) == 3); |
| uintptr_t Index = Symb.p & ~uintptr_t(3); |
| Index >>= 2; |
| return Index; |
| } |
| |
| void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const { |
| const GlobalValue *GV = getGV(Symb); |
| uintptr_t Res; |
| |
| switch (Symb.p & 3) { |
| case 0: { |
| Module::const_iterator Iter(static_cast<const Function*>(GV)); |
| ++Iter; |
| Res = skipEmpty(Iter, *M); |
| break; |
| } |
| case 1: { |
| Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV)); |
| ++Iter; |
| Res = skipEmpty(Iter, *M); |
| break; |
| } |
| case 2: { |
| Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV)); |
| ++Iter; |
| Res = skipEmpty(Iter, *M); |
| break; |
| } |
| case 3: { |
| unsigned Index = getAsmSymIndex(Symb); |
| assert(Index < AsmSymbols.size()); |
| ++Index; |
| Res = (Index << 2) | 3; |
| break; |
| } |
| } |
| |
| Symb.p = Res; |
| } |
| |
| std::error_code IRObjectFile::printSymbolName(raw_ostream &OS, |
| DataRefImpl Symb) const { |
| const GlobalValue *GV = getGV(Symb); |
| if (!GV) { |
| unsigned Index = getAsmSymIndex(Symb); |
| assert(Index <= AsmSymbols.size()); |
| OS << AsmSymbols[Index].first; |
| return object_error::success;; |
| } |
| |
| if (Mang) |
| Mang->getNameWithPrefix(OS, GV, false); |
| else |
| OS << GV->getName(); |
| |
| return object_error::success; |
| } |
| |
| static bool isDeclaration(const GlobalValue &V) { |
| if (V.hasAvailableExternallyLinkage()) |
| return true; |
| |
| if (V.isMaterializable()) |
| return false; |
| |
| return V.isDeclaration(); |
| } |
| |
| uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const { |
| const GlobalValue *GV = getGV(Symb); |
| |
| if (!GV) { |
| unsigned Index = getAsmSymIndex(Symb); |
| assert(Index <= AsmSymbols.size()); |
| return AsmSymbols[Index].second; |
| } |
| |
| uint32_t Res = BasicSymbolRef::SF_None; |
| if (isDeclaration(*GV)) |
| Res |= BasicSymbolRef::SF_Undefined; |
| if (GV->hasPrivateLinkage()) |
| Res |= BasicSymbolRef::SF_FormatSpecific; |
| if (!GV->hasLocalLinkage()) |
| Res |= BasicSymbolRef::SF_Global; |
| if (GV->hasCommonLinkage()) |
| Res |= BasicSymbolRef::SF_Common; |
| if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage()) |
| Res |= BasicSymbolRef::SF_Weak; |
| |
| if (GV->getName().startswith("llvm.")) |
| Res |= BasicSymbolRef::SF_FormatSpecific; |
| else if (auto *Var = dyn_cast<GlobalVariable>(GV)) { |
| if (Var->getSection() == StringRef("llvm.metadata")) |
| Res |= BasicSymbolRef::SF_FormatSpecific; |
| } |
| |
| return Res; |
| } |
| |
| const GlobalValue *IRObjectFile::getSymbolGV(DataRefImpl Symb) const { |
| const GlobalValue *GV = getGV(Symb); |
| return GV; |
| } |
| |
| basic_symbol_iterator IRObjectFile::symbol_begin_impl() const { |
| Module::const_iterator I = M->begin(); |
| DataRefImpl Ret; |
| Ret.p = skipEmpty(I, *M); |
| return basic_symbol_iterator(BasicSymbolRef(Ret, this)); |
| } |
| |
| basic_symbol_iterator IRObjectFile::symbol_end_impl() const { |
| DataRefImpl Ret; |
| uint64_t NumAsm = AsmSymbols.size(); |
| NumAsm <<= 2; |
| Ret.p = 3 | NumAsm; |
| return basic_symbol_iterator(BasicSymbolRef(Ret, this)); |
| } |
| |
| ErrorOr<IRObjectFile *> llvm::object::IRObjectFile::createIRObjectFile( |
| std::unique_ptr<MemoryBuffer> Object, LLVMContext &Context) { |
| ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Object.get(), Context); |
| if (std::error_code EC = MOrErr.getError()) |
| return EC; |
| |
| std::unique_ptr<Module> M(MOrErr.get()); |
| return new IRObjectFile(std::move(Object), std::move(M)); |
| } |